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Re-enable inline memcpy expansion for Thumb1.

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Patch by Moritz Roth!



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208994 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
James Molloy
2014-05-16 14:24:22 +00:00
parent 74c8558965
commit b32cee560d
4 changed files with 65 additions and 11 deletions
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7
lib/Target/ARM/ARMSelectionDAGInfo.cpp
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@@ -53,9 +53,10 @@ ARMSelectionDAGInfo::EmitTargetCodeForMemcpy(SelectionDAG &DAG, SDLoc dl,
EVT VT = MVT::i32;
unsigned VTSize = 4;
unsigned i = 0;
const unsigned MAX_LOADS_IN_LDM = 6;
SDValue TFOps[MAX_LOADS_IN_LDM];
SDValue Loads[MAX_LOADS_IN_LDM];
// Emit a maximum of 4 loads in Thumb1 since we have fewer registers
const unsigned MAX_LOADS_IN_LDM = Subtarget->isThumb1Only() ? 4 : 6;
SDValue TFOps[6];
SDValue Loads[6];
uint64_t SrcOff = 0, DstOff = 0;
// Emit up to MAX_LOADS_IN_LDM loads, then a TokenFactor barrier, then the